



 
Hi Bill, Percent Error is calculated by determining an experimental value (b) from your results and then comparing it to the accepted literature value (a) according to the formula: In your case, the experimental value is 35 accepted value would be 20. Some things to consider when calculating accuracy:
If these above conditions are not met then the percent error is uncertain. Accuracy can be expressed as 100%percent error Hope this helps, Janice  


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